docs: def read_altitude(self, sealevel_pa=101325.0):
          """Calculates the altitude in meters."""
          # Calculation taken straight from section 3.6 of the datasheet.
          pressure = float(self.read_pressure())
          altitude = 44330.0 * (1.0 - pow(pressure / sealevel_pa, (1.0/5.255)))
          self._logger.debug('Altitude {0} m'.format(altitude))
          return altitude